I am wondering if someone can assist in this problem. I have an HP Officejet Pro (L7680) AIO and I keep getting a paper jam error after a few pages have printed. It tells me to turn the unit around and remove the back (duplexer) and remove the paper. There is no paper jammed in there. I have done this a dozen times, restarted the machine, unplugged it... I dont know what else to do. I did all the instructions on the website(see link below). THis is a FALSE MESSAGE and I cannot get it to stop showing up.

This fix applies to paper jams the device believes are in the rear duplexer and often occurs after a real jam that has shredded the paper inside the mechanism.

Despite the fact you've carefully cleaned out all the visible paper from inside with the cover open, paper can jam the gears used to drive the rear rollers and even the tiniest amount of shred prevents operation resulting in the impossible Paper Jam error.

HP Tech Support online and on the phone don't troubleshoot it past "clear the paper from the device than try again please" b.s.

After removing the duplexer, grip any of the four rubber rollers and attempt to rotate in either direction, if they don't move freely with little effort, then continue with these instructions.

Begin:

1. Take the first paper clip and contact the lower two brass rectangles, this fools the device into believing the duplexer is installed, keep the contacts bridged (don't remove your hand or the paper clip until Step 4.) THERE IS NO ELECTROCUTION RISK.2. Press the "OK" button on the control panel to pretend the paper jam is cleared.3. CAREFULLY OBSERVE THE pair of white gears on the left, if they seem to clutch, stall, skip or freeze then you have paper shards which are causing the jam.4. Using a firmer grip or pliers, grip the furthest left rubber roller and rotate in either direction , the gears should rotate with your efforts and look for shards of paper in the gear teeth.5. Use the paper clip, toothpick or any appropriate edged tool to clear the shards.

Bridge the lower contacts again and observe if the gears rotate freely, if so then you've cleared the insidious jam should be able to print until the next error from this piece of chit printer.

Hey. Saw your numerous posts at different times during 2009 and wanted to let you know I posted a potential solution for you. Hope it works for your situation... I've copied idea below for your review. Worked perfectly for me 15 minutes ago.

This fix applies to paper jams the device believes are in the rear duplexer and often occurs after a real jam that has shredded the paper inside the mechanism.

Despite the fact you've carefully cleaned out all the visible paper from inside with the cover open, paper can jam the gears used to drive the rear rollers and even the tiniest amount of shred prevents operation resulting in the impossible Paper Jam error.

HP Tech Support online and on the phone don't troubleshoot it past "clear the paper from the device than try again please" b.s.

After removing the duplexer, grip any of the four rubber rollers and attempt to rotate in either direction, if they don't move freely with little effort, then continue with these instructions.

Begin:

1. Take the first paper clip and contact the lower two brass rectangles, this fools the device into believing the duplexer is installed, keep the contacts bridged (don't remove your hand or the paper clip until Step 4.) THERE IS NO ELECTROCUTION RISK.2. Press the "OK" button on the control panel to pretend the paper jam is cleared.3. CAREFULLY OBSERVE THE pair of white gears on the left, if they seem to clutch, stall, skip or freeze then you have paper shards which are causing the jam.4. Using a firmer grip or pliers, grip the furthest left rubber roller and rotate in either direction , the gears should rotate with your efforts and look for shards of paper in the gear teeth.5. Use the paper clip, toothpick or any appropriate edged tool to clear the shards.

Bridge the lower contacts again and observe if the gears rotate freely, if so then you've cleared the insidious jam should be able to print until the next error from this piece of chit printer.

most of the time for a paper jam, there is a QUEUE of papers waiting to be printed. id take out the usb cable via the back of the computer {the one that connects to the printer} go into the control panel, look for printers, double click on that, find the printer, it should say {working offline} right click that, choose the uninstall/delete opts. turn off the printer. reboot the machine, wait until it boots all the way up. take the printer, turn it on, then plug back in the usb cable to the back of the machine. if it is windows either xp/vista it will auto find the usb cable and install automatically. you can then go back to the control panel, printers and it should be listed in the directory. try to right click go to properties of the printer and do a TEST PRINT, should print out. get more help